Pulp-mill



2 Sheets-Sheet 1.

H. P.. CHENEY.

(No Model.)

PULP MILL.

I Patented Mar. l, 1887.

] wuewto z.

.mum

Mw m" WW1/Leones (No Model.) 2 sheetssheet 2'.

H. P. CHENEY.

PULP MILL.

No. 358,593. Patented Mar. 1, 1887.

UNITED PATENT PULPmivilLL.

SPECIFICATION forming part of Letters Patent No. 358,593, dated March 1, 1887.

Application mea August 3, reso. semi No. 209,892. (No modem To aZZ whom it may concern:

Be it known that l, HENRY P. CHENEY, a citizen of the United States, residing at Manchester, in the county of Hillsborough and State ofN ew Hampshire, have invented certain new and useful Improvements in Pulp-Mills; andI do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art towhich it appertains to make and use the same, reference beinghad to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

This invention relates to an improved pulp mill for grinding or reducing Wood to pulp for use in the manufacture of paper, paper-board, and all the many and various articles that may be made from paper-pulp; and the invention consists in the construction and combination of parts, hereinafter fully set forth.

ln the annexed drawings, illustrating my invention, Figure l is a front elevation of my improved pulp-mill. Fig. 2 is a vertical section ofthe same on the line x x of Fig. l. Fig. 3 is an enlarged detail plan'of the hand-wheel and the movable nut.

Like letters of reference designate like parts in all the views.

A represents the box or receptacle, into which are placed the strips or blocks of wood, shavings, or the like that are to be reduced to pulp. Directly below this receptacle is located the chamber B, serving as the dischargechamber, in which is suitablyjournaled the grinding wheel C, carried bya shaft, D, said gri nder() be ingpreferably made of the common Ohio stone used in ordinary grindstones,and it will grind equally well when revolved in one direction as when revolved in another.

The receptacle A is a strong wooden `box firmly secured to timbers, and preferably lined with iron plates that are fastened to its sides. The periphery of the grinding-wheel Gis located in close juxtaposition to the lowermost end of the receptacle A, as shown in Fig. 2, the diameter of the stonebeing greater than the width of the receptacle, so that the finelycomminuted wood will have but a narrow space between the edge of the receptacle and the stone through which to pass. The wood as it passes from the receptacle will fall upon the inclined bottom a of the chamber B, which will serve to convey it to the strainer E,

by means of a vertically-moving horizontal follower-plate, F, which is preferably made square to correspond with the shape of the boX. A vertical worm-shaft is secured to the follower, and extends upward through a cylindrical shell, b, in the top of the frame. By l means of suitable connections between this worm-shaft and the driving-shaft D, which carries the grindingwheel, the follower is caused to pursue its downward course with a motion coincident with the motion of the grinder, and with a speed duly proportioned to what is necessary to keep a constant supply of wood in close contact with the grind'- ing-surface.

The worm-shaft G is provided with a horizontal gear-wheel, c. The drivingshaftD has mounted thereon a large driving-pulley, K, and proximate thereto a small pulley, d. The small pulley d connects by a belt, e, with a pulley, f, carried by a shaft, g, which is journaled in any suitable manner in the framework of the mill. The shaft'g carries also another pulley, h,which connects by a l'oelt, z', with apulley, j, mounted on a shaft, r, which is provided with a worm-gear, Z,and is secured to the top of the framework, so that the worm l will engage the gear c. It.will thus be obvious that when the grinding-wheel is revolved the vertical shaft G will also revolve and the follower F will descend, pushing the woodsupply in advance. When the wood-supply within the receptacle A has been-entirely ground to pulp, means are provided for returning the follower to the top of the recep` tacle, so as to allow the latter to be refilled.

m designates a hand-wheel, which is se cured to the parts of an expansible nut, n, or other equivalent clamping device. By revolving the hand-wheel the; expansion-nut is opened by allowing the pins o, affixed to the nut, to play within the eccentric slots p p of the hand-wheel, thus unclamping the nut from the shaft and disengaging the gear-wheel from the upright shaft G, so that the wheel will not actuate the shaft. The shaft G and follower, being free from connection with the mechanism which causes it to descend,will be returned to its place by means of the weight J, fastened to the rope Lwhich passes around the pulley H, and is attached to the follower near its center. Thus the follower may be lifted Without stopping the grinding-wheel. W'hen the nut is reclamped by a reverse motion of the hand-wheel, the follower will again descend.

Water is introduced to the chamberA by means of a pipe, L, and passes out through the strainer E. The mill, it will be seen, is so constructed that no pulp can splatter out during the grinding process; but everything may be kept neat and clean about the mill. The mechanism is so extremely simple that there is but little danger of its becoming inoperative. The refilling of the box A is readily performed, and causes but slight delay in the working of the machine.

With this improved machine large blocks of Wood, two feet in length, say, may be ground in like manner with small pieces. The pulp produced is of a very superior quality, while the quantity is greater than can be made by any other, for it will produce one ton and upward of dry pulp every twenty-four hours. The machine is in general much less expensive than others now in use. All of these considerations give the machine a superior utility and value.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The combination ofthe supply-box A, chamber B, grinding-wheel G on the shaft D, follower F, worm-shaft G, having gear c and expansible nut a, hand-wheel m, the system of belts and pulleys connecting the gear c with the shaft D, and the weighted rope I, secured to the follower, all arranged as set forth and shown.

2. The combination of the chambers A and B, the former having water -supply L and the latter an exitopening, the grinder C, mounted on the shaft D, the follower F,worm shaft G, gear c, expansiblenut n, and the connecting mechanism between shaft D and gear c, consistingof pulleys d, f, h, and j, and worm Zand belts e and i, all combined to operate substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

HENRY l). CHENEY.

Witnesses:

H. F. Monsir, B. P. CILLEY. 

